4972643947 has 2 divisors, whose sum is σ = 4972643948. Its totient is φ = 4972643946.

The previous prime is 4972643911. The next prime is 4972644013. The reversal of 4972643947 is 7493462794.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4972643947 is a prime.

It is not a weakly prime, because it can be changed into another prime (4972643047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2486321973 + 2486321974.

It is an arithmetic number, because the mean of its divisors is an integer number (2486321974).

Almost surely, 2^4972643947 is an apocalyptic number.

4972643947 is a deficient number, since it is larger than the sum of its proper divisors (1).

4972643947 is an equidigital number, since it uses as much as digits as its factorization.

4972643947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 55.

The square root of 4972643947 is about 70516.9763035824. The cubic root of 4972643947 is about 1706.8516957435.

The spelling of 4972643947 in words is "four billion, nine hundred seventy-two million, six hundred forty-three thousand, nine hundred forty-seven".